Costa Caio Alves da, Fernando Ramos de Carvalho Francisco, Guim Adriana, Andrade Gilcifran Prestes de, Cardoso Daniel Barros, Maciel Michel do Vale, Silva Gabriela Gonçalves da, Nascimento Andreza Guedes de Oliveira
Department of Animal Science, Federal University of Roraima, UFRR, Boa Vista, 69310-000, Roraima, Brazil.
Department of Animal Science, Federal Rural University of Pernambuco, UFRPE, Recife, 52171-900, Pernambuco, Brazil.
Asian-Australas J Anim Sci. 2019 Dec 1;32(12):1882-1888. doi: 10.5713/ajas.18.0825. Epub 2019 Feb 14.
An experiment was conducted to the effects of increasing levels of crude glycerin (0, 6, 12 and 18%) used as a substitute for corn in lamb feed on the quantitative characteristics of the carcass.
A total of 40 crossbred Santa Inês lambs that were four months old with a mean initial weight of 21.0 ± 0.8 kg were randomly distributed in four treatments with ten replicates. The animals were slaughtered after 66 days of confinement. The effects of crude glycerin as a replacement for corn in the diet of the lambs on the carcass characteristics, commercial cut weight and yield and carcass measurements were studied.
There was an increasing linear effect for body weight at slaughter with the replacement of corn by crude glycerin. The dry matter (DM) and metabolizable energy (ME) intakes, weight of the empty body, hot carcass weight and cold carcass weight showed a quadratic effect, with maximum crude glycerin levels estimated at 10.9, 9.8, 10.83, 11.78 and 11.35%, respectively. The initial pH was not influenced by the substitution of corn for crude glycerin, while the final pH presented a quadratic effect. The other parameters of the carcass and the weights and yields of commercial cuts were not influenced. There was also no effect of the diets on carcass morphometric measurements, except for the thoracic perimeter and the carcass compactness index, which presented quadratic and linear effects, respectively.
Crude glycerin can replace up to 18% of corn because favour the muscle tissue deposition without promoting changes in the main carcass characteristics of lambs.
进行一项实验，研究在羔羊饲料中增加粗甘油水平（0%、6%、12%和18%）替代玉米对胴体定量特征的影响。
总共40只4月龄的圣伊内斯杂交羔羊，平均初始体重为21.0±0.8千克，随机分为四个处理组，每组十个重复。圈养66天后对动物进行屠宰。研究了粗甘油替代羔羊日粮中玉米对胴体特征、商业切割重量和产量以及胴体测量的影响。
随着粗甘油替代玉米，屠宰时体重呈线性增加效应。干物质（DM）和代谢能（ME）摄入量、空体重、热胴体重和冷胴体重呈二次效应，估计粗甘油的最大水平分别为10.9%、9.8%、10.83%、11.78%和11.35%。初始pH不受玉米替代粗甘油的影响，而最终pH呈现二次效应。胴体的其他参数以及商业切割的重量和产量不受影响。日粮对胴体形态测量也没有影响，除了胸围和胴体紧实度指数，分别呈现二次效应和线性效应。
粗甘油可替代高达18%的玉米，因为它有利于肌肉组织沉积，而不会改变羔羊主要胴体特征。
